"Thick tar clogging 350 sq km of delicate mangrove forest and river delta, home to endangered Bengal tigers and rare dolphins."

"The United Nations said on Thursday it has sent a team of international experts to Bangladesh to help clean up the world’s largest mangrove forest, more than a week after it was hit by a huge oil spill.

Thousands of litres of oil have spilt into the protected Sundarbans mangrove area, home to rare Irrawaddy and Ganges dolphins, after a tanker collided with another vessel last Tuesday.

A team from the United Nations Disaster Assessment and Coordination (UNDAC) has arrived in the capital Dhaka to support Bangladesh’s “cleanup efforts of the oil spill in the Sundarbans”, a statement from the UN said."

Agence France-Presse had the story December 18, 2014. [2]